Automatic focus adjustment apparatus and method

Details Automatic focus adjustment apparatus and method Automatic focus adjustment apparatus and method

2008-07-08

2008-07-08

Ye, Lin (Department: 2622)

Television

Camera, system and detail

Optics

Reexamination Certificate

active

07397510

ABSTRACT:
A focus adjustment apparatus, which attains focus adjustment by extracting, as a focal point voltage, a predetermined frequency component of a video signal obtained from an image sensor upon sensing an image of an object, and moving a focus adjustment member in an optical axis direction using a moving unit to maximize the focal point voltage, has a detector that detects a half-stroke state of a shutter button, and a full-stroke state which is set via the half-stroke state, and a controller that executes focus adjustment control for the half-stroke state upon detection of the half-stroke state, and selectively enables or disables the focus adjustment control for the half-stroke state in accordance with a time elapsed from detection of the half-stroke state until detection of the full-stroke state, upon detection of the full-stroke state.

REFERENCES:
patent: 5502485 (1996-03-01), Suzuki
patent: 5751354 (1998-05-01), Suzuki et al.
patent: 7158182 (2007-01-01), Watanabe et al.
patent: 7184090 (2007-02-01), Watanabe et al.
patent: 2004/0263633 (2004-12-01), Shinohara et al.

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